Air pressure gauge



Vay 19, 1931. L. A. HALLSTEAD ET A1.

l AIR PRESSURE GAUGE Filed Nov. 24, 1924 INVENTORS. L6M A. HALLSTEAD f BL' 1 BM AITQRNS.

Patented May 19, 1931 LEN ARTHUR HALLSTEAD vM11.)`rfmusrllw' DAWS0N,, 0F Burr-Ato, New Yonxfea vslcelvos BEY L l A conrone'rron onnEW'yQ-ag: f

' In PRESSUREGAUGE Application flied November; 24, 1924. 'serial no. 752,052.

Our invention. relates ,to limprovements in airy pressure gauges, and the objectof the in"-y ventionv is .to construct an air line nozzle in Which a tire air rated. v f

l A further object of the invention li'sfto construct a nozzle having a manually controlled airinletvalvel l still further object of, thev invention is'to provide a rotatable outer 'end on thenozzle so as to permit the air pressure gauge vvhi'c'h'is incorporated vtherein'to-be in view irrespective of the position-of the tire valve to which Jthe nozzle is applied; l

Our invention consists'of angair pressure gauge constructed and arranged all as 'hereinafter more particularly describedpand illust-rated ,in *the accompanyingfdrawings inv Which`:,-

Y 'if Y .1.

Fig. 1 isz'a plan vievvofourdevice. f l

F 1g. 2fis` a 'verticall sectional vievv'through the line 2-2, Fig. l. f Fig. 3 is a cross sectional line 3-'-3, Fig. 2. Y Y

Fig. 4 is an enlargedk part sectional detail of the air pressure recordingfmeans; Y Fig. 5 is a perspective view of' the plunger for actuating the airv inlet valve. y

Fig. 6 is an yend elevational view of the nozzle 'showing in dottedwlines' the rotatable movement of the, Vend in respectk tothe main portion. o Y Like charactersof'reference indicate the corresponding parts in the different views@ 1 designates a substantially'tubular casing provided in the outer endvvith the r` nozzle chamber 2, such chamber being threaded and adapted toy receive the shouldered lbushing 3', which is threaded thereinto. 4 is the rotatable outer'end ofthe nozzle which is turned 'overat right angles Vto the main portion and provided Aonits outer end tieaiulwugh the' with an orifice adapted t0 reC'eive the valve 6. Y n .v .p

7 is an interiorly threaded tire valve engaging portion threaded onto the reduced portion 8 of the nozzle 4, and 9 is a Washer constructed of rubber or other suitable material andl interposedbetween the portion 7 and the face'of the reduced' portion 8.Y The pressure gauge 1s incorpo.-`

ori'fice inf such Washerl being of .less'diameter .than the orificeV 5 in the portion .4. Thevalve 6 is'adapted to be seated thereon and is'fheld in place by the spiral springvlO:

theVv valve 6 adapted to engagethe plunger of the tire valve and open itin the usualmenner When the nozzleis applied.` .The rotatable portion. 4 is provided on its inner end with reducedportion 12. adaptedto. beinserted intoftlie orifice.' 13 ofthe bushing 3v andV held in engagement: therewith by thelocln'iuts` 14 and l15 which are threaded ontoI the end of the portion 12. n l `16is a Washer of rubber or similar material adapted to. be inserted' between the nut'14 and the inne'rface of the bushing 3., such inner 11 isa projecting lug onthe outer' faceof ASSIGNMEMS, r9. r1.. D; TAYLOR UO-,'OF'EUEFALO; NEWXOMQ,

face 'beingprovi'ded' With av circular lip 17 which presses into` thecoacti'ng face of theV y Y vvvasher16 and constitutes an air tight joint, and 18`is apassage leading from the orifice 5 tothe outer end ofthe portion 12. f V

'L he casing` 1 is provided -Withacylindrical gauge chamber 19 and an air. passage.` 20 both v of Whi'cliextendlongitudinally of the casing and 'communicatevvith the nozzle chamber 2,

the cylindrical gauge chamber 19 being adapted to receive the pressure gauge Which We shall novv describe. `The outer end of the chamber 19 which communicates VWith the nozzle chamber `2 is threaded and receives a threaded blushing or anchor member 21Whiclh is provided `vvithreduced portion 22 on its inner face, 'and 23 is a passage extend-ing throughV the bushing`21 and thek portion 22.

24 lis ya sleeve of the sameldiameter' as the lpassage"19 andadapted to slide therein, one end of such'sleeve being interior-lythreaded t and receiving the Vplug 25'Which yhas a re duced vinner portion 26 of the lsame diameter as the lportion 22. The inner end of the portion ,22'i`s slightly reducedy andreceives the outerend of' a rubber sleeve 27, the other end of Whichissealed andin contact with the'ace of the portion v 26. Y 'f 128 is a spiral spring which 'tsoverthe V.sleeve 27, its -ends encircling the respective portions`22 and v26. 29 isa slot providedin oneV endof the kpassage `19 ythrough which the end of-the -sleeve 24 can be seen, and 30 is a dial provided with pressure indicating numerals provided on the outer face of the nozzle along one side of the slot 29. By unscrewing the anchor member 21 the gauge may be removed as an entirety through the nozzle member 2. From an inspection of Fig. 1 it will be noted that the dial 30 is located intermediate of the ends of the casing 1 so as to provide hand holds 47 and 48 on each side thereof, one of which is adapted to be gripped by one hand in positioning the nozzle over the tire valve and the other adapted to be gripped by the other hand in operating the air inlet valve. rfhe nozzle may thus be conveniently handled without obscuring the gauge from view by the hands and` may be inserted between the spokes of the wheels without bringing the hands `into proximity thereto.k

31 is a transverse bore formed in the casf ing 1 at the inner closed end of the'cylindrical gauge chamber 19 and adapted to receive the inlet valve actuating plungerwhich is reciprocal therein. The main portion of a plunger consists of an inverted cone shaped member 32 having an upwardly extending stem 33. The upper end of such stem is proA vided with a buttony 34. The lower end of the portion 32 is provided with a perforated disc 35, such disc and the larger end ofthe conical portion being of the same diameter andadapted to slide in the passage 31.

36 is a. flange formed integrally with ythe portion V1 andprovided in the passage 31 to act as a stop for the plunger therein.

37 are a pair of washers constructed of rubber or like material being of the same diameter as the passage 31, and inserted thereinto one on either side `of the fiange 36.-

38 is a yplug threaded into the lower end of the passage 31, and 39 is a spiral spring interposed betweensuch plug and the lower face of the perforated disc 35. The end of the passage 20 communicates with the lower end of the passage 31 as it is clearly illustrated in Fig. 2. The inner end of the casing 1 is formed to provide an air inlet valve chamber 40, the outer end of which is internally threaded and receives the threaded bushing 41 on the outer end ofwhich the air line hose is secured.

42 is a circular passage passing from the inner end of the inlet valve chamber 40 andcommunicating with the transverse bore 31 intermediately of its length. 43 is a. flat circular valve, the inner face of which is recessed and adapted to receive the rubber washer 44 which engagesa circular lip upon the inner end of the inlet valve chamber 40, and 45 is the valve stem secured to the valve 43 and slidable in the passageway 42 the outer end of such valve stem being in Contact with the cone f shaped portion 32 of the plunger.

46 is a spiral spring interposed between the outer face of thel valve 44, and the bushing 41, such spring being provided to keep the face of the rubber washer 44 in contact with the lip 42.

The operation of our device is as follows When the nozzle is applied to an automobile t-ire valve the plunger portion 32 is in its normal inoperative position, and the valve 44 is closed which prevents the air under pressure in the air line passing beyond the inlet valve chamber 40. When the lug 11 on the valve 6 comes into contact with the plunger in the tire valve, such plunger will be depressed thus opening the valve and permitting the air from the tire to enter into *the orice 5 and pass from thence through the passage 18 into the nozzle chamber 2 from whence it will pass through the passage 23 in the bushing 21 and portion 22, into the rubber sleeve 27 .Y As the rubber sleeve 27 is positioned in the spiral spring 28 it will not be permitted to expand diametrically under .the influence of the air pressure, but will be extended longitudinally and move the sleeve 26 along the -cylindrical Gauge chamber 19, and as the exterior of the slot `29 is suitably graduated the particular air pressure in the tire will be shown.

If the tire needs inflating the button 37 on the plunger is pressed downwardly with the thumb,its movement causing the inverted conical portion 32 of the plunger to also move downwardly, thus pushing the valve stem 45 in the direction of the inlet valve chamber 40 and opening the valve 44 which permits the air ypressure from the air line to pass around the valve andvalve stem through the passage 42 into the passage 31, and through the perforated disc 35 into the passage 20 from where it passes "through the passage 18 and orifice 5 andpast the-open valve 6 into the tire valve in the, usual manner. Upon desiring to ascertain the air pressure in the tire it is merely necessary to release the button 37 when the plungerwi-ll be restored to its initial position under the influence of the springr39 when the valve 44 will shut, thus cutting olf the air supply. Immediately this is done the air pressure from the tire will reenter the orifice 5 and pass from thence into the rubber sleeve 27, thus recording the pressure as before described.

On reference to Fig. 2 it will be seen that the end of the nozzle is secured to the main yportion in such a manner that it is rotatable therein, the inwardly extending portion 12 being rotatable in the bushing 3. The rubber washer 16 between the lock nuts and the inner face of the bushing constitutes'an air tight joint. With this feature on our device it is always possible to have the gauge portion of the nozzle facing upwardly irrespective ofthe position of thetire valve, it being merely necessary to. turn such outer portion around, that is if the valve is near the ground the end is in the position shown in full lines Y in Figure 6, orif the valve is at the upper side of the wheel the end of the Vnozzle is turned into the approximate position shownV in dotted lines in such ligure.

From the above description itwill be apparent that we have devised a useful and simple tire pressure gauge which will enable the motorist to ascertain at a glance the air pressure in his tires before and during the process of iniflating them. Furthermore we have constructed a device which can be read- Ynozzle chamber' atthe opposite endof said casing, a longitudinal chamber. opening at its outer end into the nozzle chambery and an air passage paralleling the longitudinal chamber and'connecting the-'nozzle chamber with the valve chamber, said handle ,portion being elongated and extending lengthwise of and from the longitudinal chamber; a valve operable in the valve chamber ior controlling communication between the same and the air passage, a spring contained within the cham* ber of the handle portion yfor seating the valve, means for unseating the valve, a gauge mounted for movement lengthwise of and in the longitudinal chamber and operable in response to air pressure in the nozzle chamber, and a nozzle secured in and closing the nozzle chamber. n

2. A combined air line nozzle and pressure gauge comprising a body having a nozzle chamber and an adjacent gauge chamber opening at one end into the nozzle chamber, a gauge arranged within said gauge chamber and displaceable therefrom throughV the nozzle chamber, said gauge'comprising a head v slidable within the gauge chamber and an anchor membery secured in said open end of the gauge chamber and attachedto said slidable head, said head being removable as a` unit with said anchor member through said open end and nozzle chamber, said gauge chamber being provided with a window through which the gauge is read, and a nozzle secured in said nozzle chamber and acting therewith toinclose and conceal the anchor member. v v

3. A combined air line nozzle and pressure gauge comprising aV body having a nozzle chamber and a gauge chamber opening at one end into the nozzle chamber yand having a .gauge stop at its oppositeY end, said gauge chamber being provided in one wall with a longitudinal slot constituting a window; and a gauge comprising a head slidably guided within said gauge chamber and having a part movable along the window-forming slot for indicating pressure readings, and pressure responsive means arranged within the chamber and connected to the head for actuating the same, said pressure responsive means and head being removable as an entirety fromv said gauge chamber through the nozzle chamber of said body, and said head beinglimited in its' pressure actuated movement by said stop; and a nozzle arranged in said nozzle chamber and serving to prevent unauthorized' displacementof the gauge from its chamber.

45A combined air line nozzle andr pressure gauge comprising a body having a nozzle chamber and a gauge chamber opening at one end into the nozzle chamber, said gauge chamber being provided in one wall witha window, a head slidably guided within saidV gauge chamberl and readable through the window, an anchor member `secured in the open end of the gauge chamber and accessible only through the nozzle chamber, a coil spring connecting the anchor member to the head member, an expansible pressure-responsiveL member arranged within said spring andanveo l chored to said anchor member for exerting pressure against the head, said spring serv` ing as a housing for said eXpansible member to confine its lateralexpansion, and a nozzle secured to said body within the :nozzle chamber and concealing the anchor member.

5. A combined 'air line nozzle and pressure gauge comprising a body having a nozzle chamber and a gauge chamber'opening into .l

the nozzle chamber; a gauge arranged within said gauge' member and displaceable therefrom through the fnozzle chamber,means for securing the gauge against displacement, said gauge chamber being provided witha window for reading the gauge, and fa nozzle removably engaged in the nozzle chamber and pro;

tecting said securing means yagainst being 1 tampered with. y

LEON ARTHUR I-IALLSTEAD. i DAWSON.

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